Add 90/20 and 20/72
1st number: 4 10/20, 2nd number: 20/72
90/20 + 20/72 is 43/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 20 × 18 = 360,
90/20 = 90 × 18/20 × 18 = 1620/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
20/72 = 20 × 5/72 × 5 = 100/360 - Add the two like fractions:
1620/360 + 100/360 = 1620 + 100/360 = 1720/360 - 1720/360 simplified gives 43/9
- So, 90/20 + 20/72 = 43/9
In mixed form: 47/9
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